[It's Otonashi! He had been especially concerned about her. With her memory issues, she could easily forget about the dangers waiting in her own room.]

That is correct, Otonashi-kun! [He moves quickly to approach her, though his voice remains at the same loudness all the way.] You see, something is wrong with our rooms. They seem to have turned into recreations of our worst memories! So, it would be best to avoid your room for the time being!